Milton · Office Renovations
Office Renovations in Milton
Former retail or warehouse units at Derry and Thompson or along Steeles Avenue can’t become offices in Milton without a Certificate of Occupancy (Zoning) on top of the building permit. Commercial permits skip the residential portal. Building Services sends a secure file link and replies within two business days.
Offices in Milton
What’s different in Milton
| Permit office | Town of Milton Building Services, Planning and Development Department (official site, opens in a new tab) |
|---|---|
| Change of use | Certificate of Occupancy (Zoning) required before changing the type of use of a unit. |
| ICI filing | Contact Building Services for a secure file link. Staff reply within two business days. |
| Permit fees | $7.81/m² office alteration, $22.32/m² to finish a shell, $264.20 minimum (2026). |
| Drawing format | PDFs generated from CAD, not scans, with markup permissions. |
| Downtown heritage | Main Street offices on the Heritage Register: exterior signs and windows can need approval. |
Worth knowing first
Moving into a former shop? Get the zoning certificate first
Milton requires a Certificate of Occupancy (Zoning) before any change in the type of use of land, a building or a unit. It catches many tenants who sign a lease on a former retail or warehouse space at Derry and Thompson or along Steeles Avenue. A building permit alone doesn’t authorize a new use in Milton. If the previous tenant was an office, you may not need one, but confirm with the Town. A change of use with no construction is a flat $264.20. So we check the zoning under By-law 016-2014 before you sign, and put the certificate in the permit schedule.
The scope, pricing tiers and 5-step process are the same everywhere we work. See Office Renovations ›
Frequently asked questions
Offices in Milton: three local questions
Offices fall under business and personal services in the 2026 schedule: $7.81 per m² for interior alterations and $22.32 per m² to partition and finish a shell, with a $264.20 minimum. A 250 m² (2,690 sq ft) alteration is about $1,953. Finishing a 250 m² shell is about $5,580. Signs are 1.60% of their value, with the same minimum.
Not through the residential portal. For industrial, commercial and institutional work, contact Milton Building Services with the address, and they reply with a secure file-sharing link. Staff contact the applicant within 2 business days. Drawings must be PDFs generated from CAD, not scans, with permissions that allow markup. After a completeness check the Town invoices the fee, and full review starts once it is paid.
Yes, with engineering and a permit. In the Steeles Avenue and Derry Green business parks, offices sit at the front of warehouses, and a mezzanine adds floor area above them. The Building Code limits its size before it counts as a storey, and it needs stairs, guards and exits. An engineer designs the structure. The landlord’s approval and, for a new use, the Certificate of Occupancy (Zoning) also apply.
Offices In Milton? Let’s Talk.
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